It gives a brief analysis of what precisely Williamson's motivations are, and how he and his scion Marcel Lefebvre are engaged in exploiting "religious faith for inhumane social and political policies". As Horn points out, Williamson's motives are as sinister as any other individual advancing denial. I haven't personally verified Horn's claims, but if he's correct, the Lefebvre group harboured a French war criminal (Paul Touvier) who'd organised transportation of Jews to the A.R. camps.